Improvement in the construction of watch-movements



v 2Sheets--Sheet1. J. H. FLYNT.

Cnnstructiqn of Watch Movement. 910,162,542, Patented Aprl27,l875.

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2Sheets--Sheet2.A l.4 H. FLYNT. Construction of Watch Movement. N0 162,542. 1 Patented April27,1875.

INVENTUB: 26 Cf WITNESSES Mw@ CL@ TTURNEYS.

UNITED STATES JAMES H. FLYNT, OF DULUTH, MINNESGTA.

IMPROVEMENT IN THE CDNSTRUCTEN OF WATGi-lhlOVMENTS.

Specification forming part of Letters Patent No. 162,542, dated April 27, 1875; application tiled July 11, 1874.

To all whom it may concern:

Be it known that I, JAMns H. FLYNT, ot Duluth, in the county of St. Louis and State of Minnesota, have invented a new and useful Improvemeiiit in the Construction of Watch- Movements, of which the following is a speciiication:

The invention will rst be fully described, and then pointed out in the claim.

In the accompanying drawing, Figure l is a plan View ot' the watch-movement, showing the mainspring-barrel and barrel-wheel, the balance-wheel and escapement, and the large cog-wheel, (mainly in dotted lines,) which takes the place ot' three wheels of the common watch-movement. Fig. 2 is a cross-section of Fig. l, taken on the line a' Fig. 3 is an enlarged View ot' the escapement detached. Fig. 4 shows a detail ot' the escapement-movement. Fig. 5 is a section taken on the line g/ y of Fig. 2, showing,1 a detail ot' the mainspring, barrel, ratchet-wheel, and winding-post. Fig. 6 is a face View of the watch complete, (partly in sectiom) to show the rim ofthe large plate-wheel and the escapementpinion. Fig. 7 is a face View oi the dialplate. Fig. 8 is a View of the under side of dial-wheel, of the minute-Wheel, and the cannon-pinion.

Similar letters of reference indicate correspending` parts.

A is a large pillar-plate ot' nearly the diameter ofthe Watch. This plate is made of thick brass or other suitable metal, to which the entire movement is attached. B is a large cog-Wheel, placed in a cavity formed by the surrounding illet O of the pillar-plate A, and directly beneath the face ot' the watch. This wheel is revolved by the barrelwheel D, which engages with the pinion E ot' the center-post. This post carries the hands ot' the watch, and is fast in the center of the large wheel B. F is the bridge of this center-post. G is the barrel ot' the mainspring. H is the ratchet on the stud I.

I rivet the stud I to the pillar-plate, and drill out the winding-arbor J to t onto it, and square it for the ratchet. The arbor is held in place by the pin K, which passes through the side of the key-square L, a groove bein g turned in the end ofthe stud, as seen in the drawing. By this improvement in the barrel-post I am enabled to dispense with a barrel-bridge and a number of screws.

Mis the balance-wheel. N is the balancewheel bridge. O designates the hair-spring. P is the escapement-wheel. Q is the detentlever. B is the detent-lever spring, which is made fast to the stationary post S. This spring` is made ot' a common hair -spring, in two parts, one partbearing,` upon the piu in the end ot' the lever, and the other acting,` upon the table-roller T and the other end ot' the lever.

U is the lifting` pallet and balance-statt' on the end oi' the detent-levers, which engages with the table-roller, as seen in Fig. 4. X is the impulse-pallet. V is the escapement-arbor, and YV is the escapement-bridge. V is the balance-Wheel arbor. X is `the verge. This is essentially the ilchronometer-escapement;77 but it is so much simplified as to be hardly recognized, while performing,` all its functions. The parts are unich lighter, and more easily repaired or replaced.

Y is a projection ofthe base ot' the stem Z, to accommodate the escapement-wheel, as by this arrangement that wheel is made to project from the circle, but adding' to (rather than detracting from) the general appearance of the watch.

By this construction of the watch-moyement the wheels are much reduced in number, and the parts so much simplified generally that a watch upon this plan can be produced at much less expense than it can when made in the usual manner. The friction is also so much reduced that the movement requires but about half the usual springpower employed in ordinary watches.

In Fig. 8, A represents the cannon-pinion, which tits into a hole in the center-pinion ot' the large wheel. B is the dial; C', the minute-wheel, and D an opening in plate to show seconds on large wheel.

The dial-plate is intended to shut snugly over the pillar-plate, while the pivot of the small dial-wheel iit-s tightly the hole in the center pinion, und the center-wheel pivot lepinion and Wheel, said wheel being ofnemiy ceives the small dial-wheel pivot. the circumference of the pillar-plate, and ar- Hziving thus described my invention, I ranged between the face and the piller-plate.

(Linn :is ne and desnc to secuie by Lettere JAMES H FLYL Patent- A Watch movement in which motion is Vitnesscs: communicated from the mainspring-bmrel S. HOFFMAN, Jr., to the @sainement-wheel through a single WILLIAM A. GULICK. 

